Clamp



FIG. 1 is an isometric view of the a clamp showing our new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a top plan view thereof.

The broken lines show portions of the design that form no part of the claimed design. 

CLAIM The ornamental design for a “clamp”, as shown and described. 